Skill Profile

UIKit & Auto Layout

UITableView, UICollectionView, constraints, animation, UIViewController lifecycle

Mobile Development iOS Development

Roles

where this skill appears

Levels

structured growth path

Mandatory requirements

the other 2 optional

Mobile Development

iOS Development

3/17/2026

Choose your current level and compare expectations. The items below show what to cover to advance to the next level.

What is Expected at Each Level

The table shows how skill depth grows from Junior to Principal. Click a row to see details.

Role	Required	Description
iOS Developer		Uses UIKit and Auto Layout at a basic level. Creates simple screens from designs. Understands the application lifecycle.

Role	Required	Description
iOS Developer		Independently implements complex screens with UIKit and Auto Layout. Optimizes performance and memory consumption. Works with asynchronous patterns.

Role	Required	Description
iOS Developer	Required	Architects mobile application with UIKit and Auto Layout. Optimizes performance for low-end devices. Implements CI/CD for mobile development. Mentors the team.

Role	Required	Description
iOS Developer	Required	Designs complex UIKit interfaces: custom UICollectionViewLayout for non-standard grids, compositional layout for heterogeneous content. Implements smooth animations via UIViewPropertyAnimator and Core Animation, optimizes scrolling through prefetching and cell reuse. Integrates UIKit components into SwiftUI via UIViewRepresentable.

Role	Required	Description
iOS Developer	Required	Defines UI framework strategy for large iOS applications: UIKit to SwiftUI migration, transition period architecture, and hybrid approaches. Develops high-performance custom components: text engines on TextKit 2, custom rendering via Metal, and CALayer compositions for complex visual effects.

Junior 1 requirements

iOS Developer

Uses UIKit and Auto Layout at a basic level. Creates simple screens from designs. Understands the application lifecycle.

Middle 1 requirements

iOS Developer

Independently implements complex screens with UIKit and Auto Layout. Optimizes performance and memory consumption. Works with asynchronous patterns.

Senior 1 requirements

iOS Developer
Required

Architects mobile application with UIKit and Auto Layout. Optimizes performance for low-end devices. Implements CI/CD for mobile development. Mentors the team.

Lead / Staff 1 requirements

iOS Developer
Required

Designs complex UIKit interfaces: custom UICollectionViewLayout for non-standard grids, compositional layout for heterogeneous content. Implements smooth animations via UIViewPropertyAnimator and Core Animation, optimizes scrolling through prefetching and cell reuse. Integrates UIKit components into SwiftUI via UIViewRepresentable.

Principal 1 requirements

iOS Developer
Required

Defines UI framework strategy for large iOS applications: UIKit to SwiftUI migration, transition period architecture, and hybrid approaches. Develops high-performance custom components: text engines on TextKit 2, custom rendering via Metal, and CALayer compositions for complex visual effects.

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